Zheng Qinwen on one umpire's decision in the victory over Donna Vekic, "There was a shot that, even when magnified, was nearly impossible to tell—it might have been off by just 0.01 millimeter. The umpire  ruled it out against me, and I was really speechless. Then, on one of her forehand down-the-line shots, the ball clearly looked out, but the umpire called it in. I was honestly at a loss for words. "